[OUDS] Mobile display issues

[MaxLardenois]

Prerequisites

• I have searched for duplicate or closed issues
• I have validated any HTML to avoid common problems
• I have read the contributing guidelines

Describe the issue

Several issues or improvement to make on mobile viewports

• Overflow on homepage

• Sidebar panel opening icon and icon button position do not match the sidebar interaction (it's a drawer from left, the icon and button position suggest an accordion container. Also why not have the menu title text (like Getting started, Foundation...)?
• "On this page" is right-aligned for some reason

Reduced test cases

See description

What operating system(s) are you seeing the problem on?

macOS

What browser(s) are you seeing the problem on?

Chrome

What version of Boosted are you using?

v1.1.0